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gadget is not working?  could not calibrate it!! with the solution given.  Kat is email us another one.  thanks,","checked":"qc_complete","qa_notes":null,"qa_admin_notes":"","qa_admin_notes_author_id":null,"qa_admin_notes_updated_at":null,"tested_parameters":["ph","oxygen","secchi_depth","conductivity","air_temperature","water_temperature","current_weather","previous_weather","hardness"],"photos":[],"permalink":"https://data.waterrangers.com/observations/54189","readings":[{"id":"cefa770a-f536-422f-95cb-3b55a7755f26","created_at":"2025-07-18T16:26:39.775Z","updated_at":"2025-07-18T16:26:39.775Z","parameter":"ph","unit":"std_units","value":"7.2","equipment":"water_rangers_freshwater_teststrips_ph","equipment_limit":null},{"id":"166fb3ee-3ac3-42c5-a04e-b2a0185967fa","created_at":"2025-07-18T16:26:39.779Z","updated_at":"2025-07-18T16:26:39.779Z","parameter":"oxygen","unit":"mg_l","value":"8","equipment":"chemetrics_dissolved_oxygen_mg_l","equipment_limit":null},{"id":"a899e9c2-c842-4b3b-8ffb-e67ca5838b7d","created_at":"2025-07-18T16:26:39.782Z","updated_at":"2025-07-18T16:26:39.782Z","parameter":"secchi_depth","unit":"m","value":"4.5","equipment":"secchi_disk_20cm","equipment_limit":null},{"id":"5e8b42be-36be-4478-b090-41b753e0d3ef","created_at":"2025-07-18T16:26:39.789Z","updated_at":"2025-07-18T16:26:39.789Z","parameter":"conductivity","unit":"us_cm","value":"89","equipment":"water_rangers_pen_type_conductivity_meter_low_range","equipment_limit":null},{"id":"0773d032-5569-49c4-befd-9eb6018171e2","created_at":"2025-07-18T16:26:39.800Z","updated_at":"2025-07-18T16:26:39.800Z","parameter":"air_temperature","unit":"deg_c","value":"27","equipment":"stream_thermometer_water_rangers","equipment_limit":null},{"id":"43cdbd04-46c1-4e9e-80b8-e626e19f3ca8","created_at":"2025-07-18T16:26:39.804Z","updated_at":"2025-07-18T16:26:39.804Z","parameter":"water_temperature","unit":"deg_c","value":"25.4","equipment":"water_rangers_pen_type_temperature_meter","equipment_limit":null},{"id":"c98259da-e2a7-446e-a786-53d7f0cce9de","created_at":"2025-07-18T16:26:39.807Z","updated_at":"2025-07-18T16:26:39.807Z","parameter":"current_weather","unit":"nil","value":"sunny","equipment":"community_scientist_interpretation","equipment_limit":null},{"id":"2354cb5b-77d1-4cb1-b753-82c46c97e9d2","created_at":"2025-07-18T16:26:39.811Z","updated_at":"2025-07-18T16:26:39.811Z","parameter":"current_weather","unit":"nil","value":"windy","equipment":"community_scientist_interpretation","equipment_limit":null},{"id":"6d1fa550-27af-4e65-ba4e-7fc369ba12d9","created_at":"2025-07-18T16:26:39.817Z","updated_at":"2025-07-18T16:26:39.817Z","parameter":"previous_weather","unit":"nil","value":"sunny","equipment":"community_scientist_interpretation","equipment_limit":null},{"id":"a7f64664-52f0-4e14-8882-a16bfbdea594","created_at":"2025-07-18T16:26:39.821Z","updated_at":"2025-07-18T16:26:39.821Z","parameter":"previous_weather","unit":"nil","value":"windy","equipment":"community_scientist_interpretation","equipment_limit":null},{"id":"92b727b3-4008-4cfa-87ba-d3a3e405b9ab","created_at":"2025-07-18T16:26:39.786Z","updated_at":"2025-11-19T15:02:06.662Z","parameter":"hardness","unit":"ppm","value":"0","equipment":"water_rangers_freshwater_teststrips_hardness","equipment_limit":"<="}]},{"id":"fa897516-1fe9-410e-9e14-891682113a61","created_at":"2025-07-18T16:26:39.987Z","updated_at":"2026-07-08T19:01:05.379Z","owner_id":"a60a39f8-4d60-4394-a25b-c13c9a3a7c61","location_id":"e0d5fc6b-68f8-491b-b39d-9674e22d514e","dataset_id":"a5d2ed29-580b-441d-a1a6-905133f1bf1b","form_id":"9b49ebfb-fcba-414e-b6e7-ade959611976","observed_at":"2020-07-26T13:40:00.000Z","observed_at_local":"2020-07-26T09:40:00-04:00","notes":"","checked":"qc_complete","qa_notes":null,"qa_admin_notes":"","qa_admin_notes_author_id":null,"qa_admin_notes_updated_at":null,"tested_parameters":["ph","oxygen","secchi_depth","hardness","alkalinity","conductivity","air_temperature","water_temperature","current_weather"],"photos":[],"permalink":"https://data.waterrangers.com/observations/54192","readings":[{"id":"5a7b2d48-f249-42d1-9c26-80936a1cda7c","created_at":"2025-07-18T16:26:40.001Z","updated_at":"2025-07-18T16:26:40.001Z","parameter":"ph","unit":"std_units","value":"7.2","equipment":"water_rangers_freshwater_teststrips_ph","equipment_limit":null},{"id":"fb26fb65-d59b-4c6b-a5cd-9cb6a7d9ef9d","created_at":"2025-07-18T16:26:40.011Z","updated_at":"2025-07-18T16:26:40.011Z","parameter":"oxygen","unit":"mg_l","value":"8","equipment":"chemetrics_dissolved_oxygen_mg_l","equipment_limit":null},{"id":"28dd2177-318f-4df3-969f-312577e9d265","created_at":"2025-07-18T16:26:40.019Z","updated_at":"2025-07-18T16:26:40.019Z","parameter":"secchi_depth","unit":"m","value":"4.5","equipment":"secchi_disk_20cm","equipment_limit":null},{"id":"f704f231-a474-4b17-9be9-f52544cbe1aa","created_at":"2025-07-18T16:26:40.024Z","updated_at":"2025-07-18T16:26:40.024Z","parameter":"hardness","unit":"ppm","value":"100","equipment":"water_rangers_freshwater_teststrips_hardness","equipment_limit":null},{"id":"7ae8513e-6678-4981-b92c-ed4098f88b37","crea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