Model NRC-120
I-02329- 3/3
TSURUGA ELECTRIC CORPORATION
■
Optional specification
○
Power on delay circuit (-T2, -T5, -T10)
The power on delay circuit is synchronized with the turning on of the meter relay, so the power has to be supplied from the
measurement line.
(Delay time: -T2: 2 seconds, -T5: 5 seconds, -T10: 10 seconds)
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Operation
①
Prior to the operation of instrument, check that the input rate, auxiliary supply voltage and connections are correct.
②
Before starting the measurement, check if the measuring pointer is accurately at zero (which is the point when the DC4mA
or DC1V generated by a standard voltage/current generator is input to the input terminals, respectively when the rated input
is DC4~20mA or DC1~5V). If there is a discrepancy at zero, adjust the pointer to indicate zero with the adjuster provided
on the front of the instrument.
Note)
When the input impedance at the input rating DC1 ~ 5V with the specification of 7331 accessory having more than 1 M
Ω
is
inserted the auxiliary power with opened condition of input terminal of 7331, the measuring pointer indicates more than the
upper limit of the scale.
③
Turning the high (or low) limit setting knob, set the setting index at a desired point where the relay acts.
The setting index stops at slightly beyond the scaled range. If the setting knob is forcedly turned more, it causes a breakage,
so take care with it.
④
While the instrument is powered on and when the measuring pointer exceeds the setting index (set point), the relay is
actuated and, a-c turns ON (close) and c-b turns OFF (open).
■
Calibration
When the variable resistor for span adjustment is provided, calibrate the instrument at an interval of about one year in order to
maintain long term accuracy. The calibration can be done with the zero adjuster provided on the panel front and the variable
resistor for span adjustment on the rear of the instrument. Make the calibration with the ambient condition of 23
o
C
±
5
o
C and
75%RH or less.
Motor
Power
SOURC
E
supply
Contact Information
Name : Tsuruga Electric Corporation
Address : 1-3-23 Minami-Sumiyoshi, Sumiyoshi-ku, Osaka-shi
558-0041
Japan
