Extech Instruments THD5 User Manual

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DataloggerDescription
1. USB2.0‘Plug&Play’connector.USBdriverisnotrequired.
2. LEDindicator:
Low/High:RedLEDblinkswhenmeasurementexceedsanalarmthreshold
GreenOK:GreenLEDblinksthreetimesevery5secondswhenloggerisinstandbymode.Whenlogging
isstarted,thegreenLEDblinksevery2seconds
RedLowBattery:RedLEDblinksevery2secondswhenpoweristoolowtoprovideaccuratelogging
3. NTCthermistorprovidesaccuratetemperaturemeasurements
4. Pre‐installedCR2032battery
5. START/STOPbutton:
Aftertheloggerisprogrammed,pressandholdthe‘START’buttonfor2secondstobeginlogging.To
stop,pressandholdthe‘STOP’buttonfor2seconds.
6. MARKbutton:
Thisbuttonisusedtomanuallyplacea‘bookmark’inthedatalogrecord.Thesetime‐stampedmarks
appearinthePDFreportthatcanbegeneratedonaPC.
7. IP65zippedplasticbag:
Openthebagandremovetheunitforprogramming. 
Afterprogramming,returntheunittotheplasticbagandsealthebagbeforelogging.
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Extech Instruments THD5 Specifications

Temperature Specifications

temperature range	‐30~70[o]C (‐22~158[o]F)
temperature resolution	0.1[o]C/[o]F
temperature accuracy	±0.5[o]C (0.9[o]F)

Datalogger Specifications

datalogger capacity	8192 readings
sampling interval	30 seconds, 5, 10, 30, 60, 90, 120 minutes
start delay	0, 5, 30, 45, 60, 90, 120 minutes

Alarm Specifications

alarm ranges	‐20~ ‐10[o]C, ‐10~0[o]C, 2~8[o]C, 0~15[o]C, 0~25[o]C, 15~25[o]C, etc.
alarm delay	0, 5, 30, 45, 60, 90, 120 minutes
alarm types	Single, Cumulative, and Disable

Operating Environment

operating temperature	‐30~70[o]C (‐22~158[o]F) for logging
operating relative humidity	< 80% RH
ensure room temperature when connected to PC	Yes

Battery

battery type	One (1) 3.0V CR2032 battery
battery life	One (1) year
battery installed before shipment	Yes

Weight and Dimensions

dimensions	80 (L) x 43 (W) x 2.5 (D) mm (3.2 x 1.7 x 0.1”)
weight	~10g (0.4 oz.)