7178-545-1
- 1 -
- 2-
Main specifications
Instantaneous / Integrated Flow Rate Indicator
Alarm Instantaneous Flow Rate
Indicator
Model NH
□□□
-4 NK
□□□-
4
Display and
digits
LCD, 8 digits
LCD, 4 digits
Display unit
L, m
3
and L/min, m
3
/min
L/min and m
3
/min
Output signal
* Open drain output (equivalent to open collector)
Pulse width:
5 ms or more,
Maximum rated voltage: 30VDC
Output capacity: ON resistance: 150
Ω
or less,
OFF resistance: 100k
Ω
or more
(Remaining voltage is 1.5V or less when input
current is 10 mA or less)
N/A
Alarm output
and setting
N/A
Non-voltage c contact output
110VAC 0.3A, 20VDC1A or less
High / Low setting for alarm --
one for each.
2-digit digital setting
Other functions
6-digit trip integration,
Constant setting
Integrated value zero clear,
Hold
Constant setting, Hold
Weight
Approx. 210g
Approx. 250g
NH / NK common specifications
●
Input signal
Open collector input
(supporting 4-line type of ND type flow rate sensor and OF-Z flow rate sensor)
●
Power
Built-in lithium battery. Battery life is about 10 years under normal use.
* No battery replacement.
●
Installation method
Panel embedded type
●
Operating temperature range
0 to + 60
°
C
●
Operating humidity limit: 30 to 90 %RH (No dew condensation)
●
Receivable distance
30m
●
Number of the input transmission lines
4
* For
in the table above, connectable meters are as follows.
005: ND05
010: ND10
020: ND20
05M: OF05Z
10M: OF10Z
* The pulse unit of output signal is specified on the nameplate.
Standard specifications are as follows.
NH005-4: 10mL/P
NH010-4: 1L/P
NH020-4: 1L/P
NH05M-4: 10mL/P
NH10M-4: 10mL/P
Common to NH and NK
●
Connect the wires with the meter correctly in accordance with the connection diagram.
●
Keep the wiring distance from the meter within 30 m.
●
Keep the distance of 20 cm or more from the power line (100VAC, 200VAC) for connection with the meter or this
Indicator or between them.
●
If the Indicator is affected by noise from a relay, motor, etc., install a spark killer or otherwise for noise prevention
at the noise source.
●
Be careful that this product may malfunction near equipment that generates harmonics, such as mobile phone,
ultrasonic cleaner, high frequency generator, or transceiver.
NH
●
When using the output, pay attention to the output polarity. Keep the output line at least 20 cm away from the
power line
●
Shielded cable is recommended for wiring using the output.
The shielded cable must be grounded on the side of control equipment.
When not using the output pulse, the shielded cable must be grounded on the side of this Indicator.
NK
●
Do not exceed the rated value when using contact point.
Factory default values
Mode
Mode 1
Mode 2
Mode 3
Mode 4
Mode 5
Mode 6
Mode 7
NH005-4
2500 6 02 02 02 2.0 1
NH010-4
7690 6 01 01 01 2.0 2
NH020-4
2500 5 01 01 01 2.0 2
NH05M-4
4600 7 03 03 03 2.0 2
NH10M-4
2500 6 02 02 02 2.0 1
* For the factory default values of NK, replace NH above with NK.
For NK, setting items are from Mode 1 to Mode 5.
Flow Rate Indicator NH / NK
I n s t r u c t i o n M a n u a l
Precautions in handling
Meter
Controlled
equipment
D type
2 cores
4 cores
NH
Meter
4 cores
NK
