KLEIN TOOLS ET900 USB Digital Meter Type-A Instruction Manual

: June 6, 2024
: KLEIN TOOLS

Table of Contents

KLEIN TOOLS ET900 USB Digital Meter Type-A
GENERAL SPECIFICATIONS
FUNCTION BUTTONS (FIG. 1)
OPERATING INSTRUCTIONS
CLEANING
STORAGE
CUSTOMER SERVICE
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KLEIN TOOLS ET900 USB Digital Meter Type-A

GENERAL SPECIFICATIONS

The Klein Tools ET900 is a USB digital meter for USB-A (Type-A) ports. It accurately and reliably measures and displays the USB port voltage, current, capacity, energy and resistance simultaneously. It can function with any USB-A port that has the ability to deliver power. It requires no batteries, as it draws power from the power source.

Measurement Range:
Voltage: 3 to 20V DC, +/-1% (+/-2 Bytes) accuracy
Current: 0.05 to 3A, +/-1% (+/-2 Bytes) accuracy
Charge delivered: 99,999mAh MAX
Energy delivered: 999Wh MAX
Resistance: 400Ω MAX
Elapsed Time: Up to 999 hours, 59 min, 59 sec*
Based on display layout
Operating and Storage Altitude: Up to 6562 ft. (2000 m)
Operating and Storage Temp: 14° to 122°F (-10° to 50°C)
Relative Humidity: <95% non-condensing
Dimensions: Tester: 2.84″ × 1.25″ × 0.565″ (72 × 32 × 14 mm)
Cable: Approx. 4″ (100 mm)
Weight: 1.1 oz. (31 g)
Pollution degree: 2
Drop Protection: 6.6 ft. (2 m)
Ingress Protection: IP20
Compatibility: Qualcomm Quick Charge® Compatible
Standards: Conforms to UL STD. 61010-1, 61010-2-030.

FUNCTION BUTTONS (FIG. 1)

MODE BUTTON 3 (Screen Toggle/Data Storage/Memory reset)
The Mode button serves three purposes:

Switch between screens (FIG. 2):
From the default screen, pressing and releasing once will switch to the Memory Screen.
Data/Memory Storage:
To record a reading during live monitoring event, press and hold the Mode button for 3 seconds. Release the button after the memory location (i.e. M:1) flashes momentarily on the screen. The next set of readings will be stored at the next available location until all 10 memory locations are used. NOTE: Once all 10 locations are used, subsequent readings will overwrite them, beginning with M:1. NOTE: When in the Memory screen, if the Mode button is not pressed within 3 seconds, the display will return to the Default screen.
Memory Recall/Reset:
When in the Memory Screen, repeated pressing will cycle through all 10 memory locations, beginning with M:1. You must scroll through all 10 locations to exit. NOTE: If no data has been stored into memory, pressing the Mode button will do nothing. The ET900 will only display memory locations containing stored data.
To reset or erase all data in memory, press and hold the Mode button for 5 seconds from the Memory screen until the letters CLR flash in the upper right corner (FIG. 2). All data in memory will be erased in all 10 memory locations.

$FUNCTION BUTTONS $FIG. 1$$

Power source INPUT (USB-A)
Load OUTPUT (USB-A)
Mode button
LCD display

WARNINGS: To ensure safe operation and service of the tester, follow these instructions. Failure to observe these warnings can result in severe injury or death.

This tester will NOT display current below 50 mA, even if it is allowing this to pass through. NOTE: The display will show zero current.
DO NOT use with ports that operate outside of the rated voltage and current .
Before each use verify tester operation by measuring a known voltage or current.
NEVER use on a circuit with voltage or current that exceeds the maximums specified for this device. Use caution when working with voltages above 25V AC RMS or 60V DC. Such voltages pose a shock hazard. Voltage above 24V DC will damage product. Display will read “OVERLOAD” in this condition and output port will be disabled.
DO NOT use during electrical storms or in wet weather.
DO NOT use if tester appears to be damaged.
Always adhere to local and national safety codes. Use personal protective equipment to prevent shock and arc blast injury where hazardous live conductors are exposed.

CAUTION

DO NOT attempt to repair this tester. there are no serviceable parts.
DO NOT modify this tester in any way.
DO NOT expose to extremes in temperature or high humidity.
This tester will NOT be able to monitor a source port if any of the following conditions occur:
- The USB port or plug is not properly connected.
- The source device shuts down. Some portable storage batteries have auto-shutdown or standby modes to save power if no load is detected from downstream device.

SYMBOLS ON TESTER

SYMBOLS ON TESTER

OPERATING INSTRUCTIONS

MONITORING MODE
NOTE: The input plug must be connected to a powered USB device before the downstream device is connected to the output port. “Downstream device” refers to any device that has the ability to draw current over USB power source.

Connect the input connector to the USB port to be monitored.
- The display will turn on with Klein Tools logo screen and move quickly to the Default Screen (FIG 2).
- If the source port has power, it will only display a live voltage reading within the operating range, 3-20V DC. NOTE: Most USB ports deliver ~5V DC.
Connect the device being charged to the output port of the ET900. The display will show actual readings (FIG. 2).

NOTE: “mAh” resets only when source is disconnected.

A. DC voltage
B. DC current
C. Capacity/charge delivered (mAh)
D. Energy delivered (Wh)
E. Resistance (Ω)
F. Elapsed Time (Hour:Min:Sec)
G. Memory Location (M:1, M:2, etc)
H. Memory Clear/Reset (“CLR”)
NOTE: No user-serviceable parts inside.

OPERATING INSTRUCTIONS

CLEANING

Be sure the tester is disconnected from both the input and output port. Use clean, dry, soft lint-free cloth to wipe down the entire unit.
Do NOT use abrasive cleaners or solvents.

STORAGE

Do not expose to high temperatures or humidity. After a period of storage in extreme conditions exceeding the limits mentioned in the General Specifications section, allow the tester to return to normal operating conditions before using.

DISPOSAL / RECYCLE
Do not place equipment and its accessories in the trash. Items must be properly disposed of in accordance with local regulations. Please see www.epa.gov/recycle for additional information.