A ‘Hi Heat’ setting for fixed temperature detectors which operate at more than 90ºC (194ºF) is available. It is
recommended that for most tests the ‘Heat’ (normal heat) setting is used as this will
conserve battery power.
To select a ‘Hi Heat’ test, use the ‘UP’ and ‘DOWN’
keys
on the keypad to highlight ‘Heat’. Press the
‘STATUS’ key on the keypad (Fig 32), and then move
the cursor to ‘Hi Heat’ (Fig 33) using the ‘UP’ and
‘DOWN’ keys
on the keypad
.
Press the ‘ENTER’
key to select ‘Hi-Heat’.
After selecting ‘Hi Heat’, Testifire will revert to the
‘Heat’ setting when the unit is switched off and on again.
Special Notes for Heat Detectors
Heat detectors have a thermal sensor (normally a thermistor) that detects heat. This is usually mounted
centrally within the detector which allows for easy alignment of Testifire. For heat detectors with either dual
or offset thermistors, the main duct of the Testifire head unit should be aligned with the thermal sensor.
Incorrect alignment could result in a failed test.
If after 2 minutes the test has not completed, Testifire will timeout. When Testifire is lowered (re-establishing
the Infrared beam) it will switch to ‘STANDBY’ mode, ready to carry out the next test. The ‘Status’ LED will
flash slowly alternating between green and red for 3 seconds before reverting to slowly flashing green indicating
‘STANDBY’ mode. For tests started with the Infrared Remote Control, Testifire's timeout mode is different. The
red-green flashing led timeout mode will only last for 10 seconds after which the test sequence will be cancelled
and the unit will revert back to standby mode.
When using the ‘Heat’ setting, care should also be taken not to leave the Testifire head unit in position over a
detector for too long
.
The plastics used in some detectors with thermal sensing elements that respond to rate-
of-rise, or reasonably low absolute temperatures, may soften if exposed to heat for long periods of time.
Extra care should be taken not to overheat a detector when using the ‘Heat’ setting combined with ‘Smoke’
and/or ‘CO’ (two or more at the same time) as there may be a delay in response from the slowest sensor.
This may mean that the heat has been applied for longer than necessary for the element of the detector to
activate.
page 16
NFPA 72 - Heat Detector Testing
To enable compliance with NFPA 72, a 60 second heat timer option is available. Selecting this option stops the
heat test at 60 seconds as required by the standard. A ‘Timer’ option is available for ‘Heat’ and ‘Hi-Heat’
settings.
To select the ‘Timer’ option, highlight ‘Heat’ or ‘Hi Heat’ on the ‘MAIN’ menu. Press the ‘STATUS’ key (Fig. 34),
and move the cursor by using the ‘UP’ and ‘DOWN’ keys on the keypad to highlight ‘Timer’ on the menu
(Fig. 35). Press the ‘ENTER’ key on the keypad to select. A countdown icon will appear on the ‘MAIN’ menu
alongside ‘Heat’ or ‘Hi Heat’ (Fig. 36).
Once the Timer option has been selected it will stay on until it is turned off manually or a ‘SYSTEM RESET’
takes place (see Section 6.2).
Fig. 36
Smoke
Hi Heat
CO
Menu Status
Fig. 35
Heat Status
Hi Heat On
Timer Off
Fig. 34
Fig. 32
Fig. 33
Heat Status
Hi Heat On
Timer On
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