Range Change - Teledyne HASTINGS 200 Instruction Manual

This section contains instructions to change the configuration of the power supply from the way it was set up
at the factory.
3.1

Range Change:

Since the display uses a 3-1/2 digit
LCD, the highest number that can be
displayed is 1999. If the display is to
read directly in the flow units being
used, it must be adjusted whenever the
highest digit of the maximum flow
rate changes, such as, a 20 SLPM
flow instrument being changed to 5
SLPM. If a 10 SLPM unit is ex-
changed for a 10 SCCM unit, the
display will not need to be changed at
all. If a 5 SLPM unit is changed to a
500 SCCM unit, then only the decimal
point needs to be changed,
described in Section 3.1.4. If the
supply is being used in the standard
configuration, i.e. internally generating
its own command signal, see Section
3.1.1 to adjust the display. If an
external command is being supplied,
see Section 3.1.2 to set the display.
See Section 3.1.3 if a master slave
configuration is being operated.
3.1.1 3.1.1 3.1.1 Displa Displa Display y y y y Adjustment for Inter
3.1.1 3.1.1 Displa Displa
To change the display, remove the two screws on the top of the back panel. Slide the aluminum
perforated top cover out. Turn the DISPLAY switch to the COMMAND position. Generate the
maximum command signal. Turn the command potentiometer on the front panel fully clockwise.
Turn the DISPLAY-ADJUST potentiometer for the channel to be set until the display reads
the desired full scale reading. The DISPLAY-ADJUST potentiometers are located on the PC board
near the front/center as shown in Figure 3.1. Channel 1 is on the right when looking from the front
of the power supply. Set the decimal point for the display according to Section 3.1.3 if required.
Reinstall the cover.
3.1.2 3.1.2 Displa Displa Display y y y y Adjustment for 0-5
3.1.2 3.1.2 3.1.2 Displa Displa
Remove the two screws on the top of the back panel. Slide the aluminum perforated cover out.
Turn the FLOW/COMMAND switch to the COMMAND position. Generate the maximum
command signal (normally 5.00 volts). Turn the COMMAND potentiometer on the front panel
fully clockwise. Turn the DISPLAY-ADJUST potentiometer for the channel to be set until the
display reads the desired full scale reading. The DISPLAY-ADJUST potentiometers are in the
front/center of the PC board. Channel 1 is on the right when looking from the front of the power
supply. See Figure 3.1. Set the decimal point for the display according to Section 3.1.4 if re-
quired. Reinstall the cover.
as
Adjustment for Internal Command Adjustment for Inter Adjustment for Inter
Adjustment for Inter
Adjustment for 0-5 Adjustment for 0-5 V V V V V olt Exter Adjustment for 0-5
Adjustment for 0-5
Operating Information
display adjust
potentiometers
nal Command nal Command nal Command
nal Command
olt Exter olt Exter nal Command nal Command
olt Exter olt External Command nal Command nal Command
SECTION 3
Figure 3.1
page 11