Q: Behavior of switching outputs

Hno -- hysteresis normally open: Output turns on when the set point (SP) is reached and stays on until the flow rate drops below the reset point (rP) Hnc -- hysteresis normally closed: Output turns off when the set point (SP) is reached and stays off until the flow rate drops below the reset point (rP) Fno -- window normally open: Output turns on when flow rate is between the high limit (FH or SP) and low limit (FL or rP) Fnc -- window normally closed: Output turns off when flow rate is between the high limit (FH or SP) and low limit (FL or rP) As the flow rate, Q on the y-axis, changes over time, t on x-axis, the chart above graphically depicts the behavior of the switching outputs.

Q: Behavior of analog outputs

ASP -- analog start point: The flow rate where the analog signal equals 4 mA (or O VDC in some models) AEP -- analog end point: The flow rate where the analog signal equals 20 mA (or 10 VDC in some models) MAW -- initial value of the non-scaled measuring range MEW -- final value of the non-scaled measuring range The chart shows how the analog signal and display information changes when the flow rate is above / below the scaled or non-scaled measuring ranges. This feature is useful in for your process control and troubleshooting issues. The minimum scaled measuring range is available on the product datasheet and the analog signal behavior may vary by sensor part number

Q: Behavior of pulse outputs

Pulse output ImPS -- pulse value: The volume of flow required for each pulse ImPR -- repeating pulse: When set to yes , meter provides a pulse with each volume of flow specified by ImPS; when set to no , meter provides only a single pulse when the flow volume specified by ImPS is reached. Pulse output vs. flow direction FPro = 0+: Pulses are counted only when the flow is in the positive direction (negative flow is ignored) FPro = -+: Pulses are counted in both flow directions. If flow is in the negative direction, an equal amount of flow in the positive direction must occur before the pulse output resumes.

Q: General use of the 3-pushbutton style

Step Instruction 1 Press Enter (E) once to enter programming mode. 2 Press Up or Down arrow (U/D) to view parameters or additional menus. 3 To change setting, press Enter (E) and then Up or Down arrow (U/D) and hold until the progress bar completes. Then press Up or Down arrow (U/D) to toggle through options. 4 When desired value is reached, press Enter (E) to confirm the setting.

Q: Change units of measure

Step Instruction 1 Press Enter (E) once to enter programming mode. 2 Press D until " EF " extended functions is displayed. Press E to confirm. 3 Press D until " CFG " configuration is displayed. Press E to confirm. 4 " uni.F " units of measure for flow is displayed. Press E to confirm. 5 Press U/D to change to the desired units of measure is displayed. 6 " uni.T " units of measure for temperature can be changed in the same manner. 7 Press E to confirm. After 15 seconds, the meter returns to normal run mode.

Question 1

Behavior of switching outputs

Accepted Answer

Hno -- hysteresis normally open: Output turns on when the set point (SP) is reached and stays on until the flow rate drops below the reset point (rP)
Hnc -- hysteresis normally closed: Output turns off when the set point (SP) is reached and stays off until the flow rate drops below the reset point (rP)
Fno -- window normally open: Output turns on when flow rate is between the high limit (FH or SP) and low limit (FL or rP)
Fnc -- window normally closed: Output turns off when flow rate is between the high limit (FH or SP) and low limit (FL or rP)

As the flow rate, Q on the y-axis, changes over time, t on x-axis, the chart above graphically depicts the behavior of the switching outputs.

Question 2

Behavior of analog outputs

Accepted Answer

ASP -- analog start point: The flow rate where the analog signal equals 4 mA (or O VDC in some models)
AEP -- analog end point: The flow rate where the analog signal equals 20 mA (or 10 VDC in some models)
MAW -- initial value of the non-scaled measuring range
MEW -- final value of the non-scaled measuring range

The chart shows how the analog signal and display information changes when the flow rate is above / below the scaled or non-scaled measuring ranges. This feature is useful in for your process control and troubleshooting issues.

The minimum scaled measuring range is available on the product datasheet and the analog signal behavior may vary by sensor part number

Question 3

Behavior of pulse outputs

Accepted Answer

Pulse output

ImPS -- pulse value: The volume of flow required for each pulse
ImPR -- repeating pulse: When set to yes, meter provides a pulse with each volume of flow specified by ImPS; when set to no, meter provides only a single pulse when the flow volume specified by ImPS is reached.

Pulse output vs. flow direction

FPro = 0+: Pulses are counted only when the flow is in the positive direction (negative flow is ignored)
FPro = -+: Pulses are counted in both flow directions. If flow is in the negative direction, an equal amount of flow in the positive direction must occur before the pulse output resumes.

Question 4

General use of the 3-pushbutton style

Accepted Answer

Step	Instruction
1	Press Enter (E) once to enter programming mode.
2	Press Up or Down arrow (U/D) to view parameters or additional menus.
3	To change setting, press Enter (E) and then Up or Down arrow (U/D) and hold until the progress bar completes. Then press Up or Down arrow (U/D) to toggle through options.
4	When desired value is reached, press Enter (E) to confirm the setting.

Question 5

Change units of measure

Accepted Answer

Step	Instruction
1	Press Enter (E) once to enter programming mode.
2	Press Up or Down arrow (U/D) to view parameters or additional menus.
3	To change setting, press Enter (E) and then Up or Down arrow (U/D) and hold until the progress bar completes. Then press Up or Down arrow (U/D) to toggle through options.
4	When desired value is reached, press Enter (E) to confirm the setting.

Question 6

Scale the analog signal (output 2 only)

Accepted Answer

Output 2 is available for an analog signal for flow, pressure or temperature. The value to be scaled must be selected first.

Step	Instruction
1	Press E to enter programming mode.
2	Press D until "EF" extended functions is displayed. Press E to confirm.
3	Press D until "OUT2" is displayed. Press E to configure the output.
4	"SEL2" is displayed. Press E to change the desired process value (flow, temperature or pressure) is displayed. Press E to confirm.
5	Press D until "ou2" is displayed. Press E to change the output to "I" for analog signal. Press E to confirm the setting.
6	Press D and "ASP2" analog start point for output 2 is displayed. Press E to confirm.
7	Press U/D to enter the value representing the analog start point (4 mA). Press E to confirm setting.
8	Press D until "AEP2" analog end point for output 2 is displayed. Press E to confirm.
9	Press U/D to enter the value representing the analog end point (20 mA). Press E to confirm setting.
10	Press D until the unit is returned to the "Run" mode.

Note that the minimum distance between ASP and AEP is 20% of the full measuring range of the meter.

Question 7

Set up totalizing function (output 1 only)

Accepted Answer

Step	Instruction
1	Press Enter (E) once to enter programming mode.
2	Press Up or Down arrow (U/D) to view parameters or additional menus.
3	To change setting, press Enter (E) and then Up or Down arrow (U/D) and hold until the progress bar completes. Then press Up or Down arrow (U/D) to toggle through options.
4	When desired value is reached, press Enter (E) to confirm the setting.

Reset totalizer using ZH4217 external pushbutton

Note: This feature changes output 2 to an input; therefore, it cannot be used as an output.

Refer to FAQ #5 for details.

The totalizer will reset every time the pushbutton is pressed.

Air flow meters | Device configuration and programming

Setup with moneo

moneo | configure

moneo | blue

Programming using pushbuttons

Common programming features

Display and indications