11
4 Parts and Controls
4
Parts and Controls
The user should become familiar with the calibrator and its parts.
4.1
Back Panel
The back panel (Figure 2) consists of the power cord inlet, power switch, heater voltage switch,
serial port, and fan.
115V
115V
115 VAC 50/60 Hz 340 W
230 VAC 50/60 Hz 340 W
HEATER
VOLTAGE
SWITCH
RS-232
115 V - 4 A F 250 V
230 V - 2 A F 250 V
Figure 2 Back Panel
Power Inlet
– At the rear of the calibrator is the removable power cord inlet that plugs into an
IEC grounded socket.
Power Switch
– The power switch is located on the power entry module (PEM). The PEM also
houses the fuses and the dual voltage selector. The PEM and Heater Voltage Switch (see below)
allow the unit to be field switchable for 115 VAC (
±
10%) or 230 VAC (
±
10%) operation.
Heater Voltage Switch
– To be used only when changing the input voltage. (See Section 7.2
for instructions on changing the input voltage.)
CAUTION: Do not plug the unit into 230 V if the heater switches and fuse holder read
115 V. This action will cause the fuses to blow and may damage the instrument.
Serial Port
– A DB-9 male connector is present for interfacing the calibrator to a computer or
terminal with serial RS-232 communications.
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