User Manual

7. Error messages
11
E1: Front bezel is not fastened correctly. If the E1 messa-
ge appears, the instrument must be switched off.
Remove the front bezel screw, reseat the reflector
and tighten the front bezel screw (
➀).
Underside:
➀
8. External triggering
The testo 476 can be externally triggered.
The EXTERNAL TRIGGER jack is DTL/ TTL compatible. It
detects a square-wave signal of 0 to +5 volts which is at
least 800nsec in duration.
The EXTERNAL TRIGGER jack uses a standard 1/8” phono
plug with the configuration shown below (only valid for
supplied plug!):
➀ The outer connection (barrel) is common.
➁ The middle connection provides a +7,2V DC output to
drive external sensors which are not self-powered.
➂ The center connection is the input signal, which triggers
the flash.
NOTES:
Turn the Pocket-Strobe off when inserting or removing a
trigger cable.
Whenever an external trigger is used, the Flash
Adjustment Knob is disabled.
WARNING:
Do not trigger the device with signals over 208 Hz.
EXT illuminates when External
Trigger Jack is plugged.
➀
➂
➁
➀➂➁