Aichi Tokei Denki NH***-4 Series Instruction Manual

Flow Rate Indicator NH / NK
I n s t r u c t i o n M a n u a l
Main specifications
Instantaneous / Integrated Flow Rate Indicator
Model NH□□□-4
Display and LCD, 8 digits
digits
3
Display unit L, m and L/min, m
* Open drain output (equivalent to open collector)
Pulse width: 5 ms or more,
Maximum rated voltage: 30VDC
Output signal Output capacity: ON resistance: 150Ω or less,
OFF resistance: 100kΩ or more
(Remaining voltage is 1.5V or less when input
current is 10 mA or less)
Alarm output
N/A
and setting
6-digit trip integration,
Other functions
Integrated value zero clear,
Weight Approx. 210g
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
● Receivable distance 30m
●Number of the input transmission lines 4
* For  in the table above, connectable meters are as follows.
005: ND05 010: ND10
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
NH05M-4: 10mL/P NH10M-4: 10mL/P
- 1 -
Alarm Instantaneous Flow Rate
Indicator
NK□□□-4
LCD, 4 digits
3 3
/min L/min and m /min
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
Constant setting
Constant setting, Hold
Hold
Approx. 250g
● Operating humidity limit: 30 to 90 %RH (No dew condensation)
020: ND20
NH020-4: 1L/P
Precautions in handling
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.
Meter
4 cores
NK
● Do not exceed the rated value when using contact point.
Meter
4 cores
Factory default values
Mode Mode 1 Mode 2 Mode 3
NH005-4 2500 6 02
NH010-4 7690 6 01
NH020-4 2500 5 01
NH05M-4 4600 7 03
NH10M-4 2500 6 02
* For the factory default values of NK, replace NH above with NK.
For NK, setting items are from Mode 1 to Mode 5.
Controlled
NH
equipment
2 cores
D type
NK
Mode 4 Mode 5 Mode 6
02 02 2.0
01 01 2.0
01 01 2.0
03 03 2.0
02 02 2.0
- 2-
7178-545-1
Mode 7
1
2
2
2
1