54
Magtrol Model DSP7000 Dynamometer Controller
Chapter 5 – Alarm System
SETUP • OPERA
TION
5.8
water flow alarm
• Used to indicate lack of water flow
• Only for use with Eddy-Current or Powder Brake Dynamometers
• Default is set in “OFF” mode
• Monitored only when the brake is “ON”
5.8.1
i
nSTruCTionS
for
w
aTer
f
low
a
larM
S
eTup
1. Starting from main menu, press ShIFT.
2. Press SETUP button.
3. Select DYNo.
4. Select ALARMS.
5. Press ShIFT. The display should appear as follows:
POWER
BRAKE STATUS
SET POINT
SET POINT
P
I
D
TORQUE
SPEED
USER DISPLAY
DO YOU WANT WATER FLOW ALARM?
XXX
Figure 5–19 Water Flow Alarm Setup Display
6. Press SCALE I button to select YES.
7. Press ShIFT 4 times to complete Water Flow Alarm setup and return to the main menu.
5.8.2
w
aTer
f
low
a
larM
a
CTion
When there is a lack of water flow, the display will flash “LoW WATER FLoW” (as indicated in
Figure 5–20. The alarm relay will open and the excitation current will automatically drop to 10%
of the last excitation current. Standby signal is not cycled.
POWER
BRAKE STATUS
SET POINT
SET POINT
P
I
D
TORQUE
SPEED
USER DISPLAY
**** LOW WATER FLOW ****
TORQUE=XXX.XX XX
RPM=XXXXX
Figure 5–20 Water Flow Alarm Message Display
5.8.3
T
o
r
eSeT
w
aTer
f
low
a
larM
Press any front panel button other than ShIFT. If the alarm condition is clear, the unit will return
to normal operation. Although not recommended, another option would be to disable the alarm by
following the alarm setup instructions in
Section 5.8.1 – Instructions for Water Flow Alarm Setup
.